Erflow-controlled safety device for oil burners



Oct. 2, 1923. 1,469,346

, J. WESTAITL OVBRFLOW CQNTROLLED SAFE TY DBVIC FOR OIL BURNERS 7 FiledJuno 6. 1921 3W Job); West all;

burned Patented 0a. 2, 1923.

UNITED STATES JOHN WESTALL, OF FALL RIVER, MASSACHUSETTS.

ERFLOWCONTROLLED SAFETY DEVICE FOR OIL BURNERS.

Application filed June 6, 1921.

To all w/lmn it may; concern:

Be it known that 1, JOHN TES'IALL, a citizen of the United States,residing at Fall River, in the county of Bristol and State ofMassachusetts, have invented certain new and useful Improvements inOverflow-Controlled Safety Devices for Oil Burners of which the followinis a specification, reference being: had to the accompanying drawings.

This in Yention relates to oil burners of the type shown in my PatentsNos. 1293,5830 granted on February 4-. 1919, and 1,348,528 granted onAugust I}, 19%, and particularly to automatic'controlling means for theelectrio motor of this burner. M

In the form of burner which forms the subject matter of said patents,there is pro-- vided a burner plate upon which the oil is allowed toflow and on which the oil is and a rotatable breaker mounted above theplate and driven by a motor, this breaker actin; to intimately mix theair and vaporized oil passing up "a rd from the plate. This breaker iscontinuously rotated while the burner is in operation and is preferablydriven by an electric motor. here may be occasions upon which theelectric motor will Stop, because the current accidentally shut oil orthe circuit through the motor broken in some way and it is thendesirable to absolutely shut oil' the current or break the circultthrough the motor so that the motor shall not again start up until acontrolling switch is manually thrown.

The object of my invention is to provide means which is controlled liythe overflow of the burner which will automatically cut oil the oilpassing to the burner and auto math-ally shift the controlling switchfor the motor when the oil accumulates upon the burner plate or in theburner bowl to too great an extent and flows oil. showing that theburner is not operatingproperly.

And a further object is to provide a consirurlion oi this kind which. ifthe current be shut otl'. causes the oil to flow into an overflow tankwherein there is a float, this float lacing connected to the controllingswitch of the motor so that as the overflow tank fills the float willrise and will eventually open the controlling switchand also turn theout off valve controlling the flow of oil from the supply tank to theburner, thus preventing any flooding of the burner or the fire honor thefurnace in which the burner is placed.

Serial No. 475,369.

My invention is illustrated in the accompanying drawings, where1nz-Figure 1 is a side elevation of a furnace partly broken away showing mymechanism applied to the oil burner thereof;

Figure 2 is a fragmentary section through the burner;

Figure 3 is a View of the switch showing the manner in which it isoperated by the #5 float rod;

Figure 4 is an elevation of the fuel Valve showing how it is operated bythe float rod. Referring-r to these drawings, A designates a furnace ofany usual or suitable character and ll the burner which forms thesubject matter of my prior patents. It is not-beiieved' necessary todescribe this burner, except to say that there is a bowl or plate 10forming the burner which is supplied with oil from an oil supply pipe 11extending to a supply tank 12, from which the oil flows by gravity. Thisburner plate or bowl is provided with air inlet openings 13 andpassingthrough the bowl of the burner is a shaft tending shaft 16 drivenby an electric motor B5 17. This motor is shown as securing its currentfrom wires 18 and 19 connected to a lii'ie connection 20 which isdiagrammatically illustrated. this circuit having therein the knifeswitch 21. 4 in the oil pipe 11 there is disposed a cutoil valve 22. Ihave also illust *ated the gas pipe 23 which extends from any suitablesource, of supplv to the controlling: valve 24 therefor and then extendsdownward and into the side of the burner to maintain a pilot lighttherein. Disposed above the bot tom of the bowl or burner plate 10 is anoverflow pipe 25 whose extremity is disposed about 1' above, the bottomoi the burner plate and which extends downward and discharges into anoverflow tank 26. and in the overflow tank is disposed a float 27 of anysuitable character.

(onnected to the float is a vertical rod 105 28 vhich may be mounted insuitable guides and in any desi ed location and this rod at its upperend has a head 29 which extends beneath the handle of the knife switch21.

The. valve 22 is provided with a stem or snindie 30. and projecting fromthis spindle is an arm 31. Extending from the'rod 28 is an '1 i q ,1 i

mus ning toe switch 23. end as the same tune as 32 will. 921 22112. wirin 3i eventually clos" 2 th valv... e. sting" the flow oi oi to theion v the sa time cutting oil the supply .aric cum no to the motor.

'-. ooe'ration of this mechenisn'i will he hss one before, Forthe tank12 iiows down- 0 the pipe 11. the .ieii g controlled b 21 controllii."ie ipe line, and is supplied. tu the line burner should consume inuehsu nlied to it out any over ow J sses hack into the overflow tanh I thev-il gathers on the hottoni or and r to a depth of about t" as theheaters are operating c-e consunied. When. however.

cease to operate or if from any c 1' amount of oil supplied to than theburners can use. the oil aces to rise in the bowl of the burner PVC onburner plate and will ritually how i through the overflow pipe ,into

tilt overflow tank and when the oil has reached a certain point in thistank, the float 2? will riseand in rising will open the switch 21. thusbreaking the cirouitof the motor and closing the cutoff valve 52:2, thuspreventing the passage of any more oil to the burner until this cut-offvalve is manually. opened again and the switch '21 is manuallyclosedagain. This prevents any flooding: of the burner with oil or theflooding of the fire box of the" furnace with oil.

have illustrated the particular burner which forms the subject matter ofmy patent: in connection with this regulating I11QCl1 anisni, but I wishit understood that I am otlimited to the use of this safety cut olimechanism or regulating mechanism with the particular form of burneretc, which is illustrated in the drawings.

1 IJl1lIl1I- 1. Tit combination with a mi burner a feed pip;- therefor,a rotatable motor driven ineinher enacting with "he burner, an electricmotor opeiutivcl3 connected to said member to drive it. .and conneced incircuit with the source of power, of a switch in said circuit; avcut-oil valve in the feed pipe, an overflow tank. an overlie pipeleading from the hurncr to the tank, a float disposed in the tank. and asingle member operatively connected to the.

float. and acting to simultaneously open said Wit-ch and close thecut-oil valve when the torn re ed a predetermined distance by theaccunnilation of oil in the overflow tool: said member permitting theindependent manual operation of the cut-oil valve and switch.

2. The combination with an oil burner a ecd pipe therefor, a motoroperated. nicinhcr ginning part of the burner and an electric motor fordriving said member connected in circuit with a source of power, of aswitch blade in said circuit. a cut-off valve in the feed pipe having astem and an arm extending therefrom, an overflow tank, an overflow pipeleading from the burner and discharuin into the tank, a float in thetank. a rod extending upward from the float and having a member in whosepath of travel the said switch is disposed, and an arm on said rod inwhose path of travel the arm on the valve stem is disposed wherehv uponan upward movementof the float. due to an accumulation of oil within theovertlow tank the switch will he opened and the cut-oil valve closed.

In testimony whereof I he signature.

cnnto aflix my JOHN WESTALL.

